MIC4680 Micrel Semiconductor, MIC4680 Datasheet - Page 14

• Manufacturer Part Number: MIC4680
• Description: 1A 200kHz SuperSwitcher Buck Regulator Final Information
• Manufacturer: Micrel Semiconductor

MIC4680
Applications Circuits*
For continuously updated circuits using the MIC4680, see Application Hint 37 at www.micrel.com.
* See Application Hint 37 for bills of material.
MIC4680
SHUTDOWN
ENABLE
+34V max.
+4.5V to +17V
GND
J1
J3
22 F
35V
C1
330 F
25V
C1
OFF
+12V
GND
ON
J1
J2
S1
NKK G12AP
2
1
SOP-8
IN
SHDN
U1 MIC4680BM
100nF
C4
68 F
20V
Figure 7. Constant Current and Constant Voltage Battery Charger
C2
GND
5–8
Figure 8. +12V to –12V/150mA Buck-Boost Converter
C5
33 F
35V
2
1
SW
FB
SOP-8
IN
SHDN
MIC4680BM
3
4
MIC4417BM4
GND
2
1
SOP-8
IN
SHDN
U1 MIC4680BM
Figure 9. 5V to 3.3V/5A Power Supply
5–8
SW
GND
FB
U2
R1
1k
5–8
3
4
SW
FB
LM4041DIM3-1.2
D1
5A
3
4
D1
MMBR140LT3
100 H
Si4425DY
* I
L1
D1
ES1B
1A 100V
SAT
50 H
14
220 F
L1*
33 H
L1
16V
= 8A
C2
1N4148
D3
C3
220 F
10V
C3
0.022 F
50V
U2
10k
R6
C3
220 F
16V
C5
220nF
0.100
20m
R3
1k
1%
R4
16.2k
R5
221k
R1
8.87k
R2
1k
R2
R1
R4
1k
1%
R5
16k
1%
4
3
R7
4.99k
C1
68 F
20V
5
2
10nF
C4
MIC6211BM5
16k 1%
MIC6211BM5
U3
R6
–12V/150mA
U3
C2
0.1 F
1N4148
C4
1000pF
D2
GND
J3
J4
1N4148
D2
R2
3.01k
R3
976
3.01k
1.78k
1%
1%
R7
R8
800mA 5%
5V 2%
GND
J2
J4
June 2000
3.3V/5A
C5
0.1 F
GND
Micrel